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      "nts_short": "CUAG",
      "nts_long": "///A/12,///A/13,///A/14,///A/15"
    },
    {
      "index": 27,
      "num_nts": 4,
      "nts_short": "ACAU",
      "nts_long": "///A/76,///A/75,///A/74,///A/106"
    },
    {
      "index": 28,
      "num_nts": 4,
      "nts_short": "CUGC",
      "nts_long": "///B/12,///B/13,///B/46,///B/45"
    },
    {
      "index": 29,
      "num_nts": 4,
      "nts_short": "GAAG",
      "nts_long": "///B/15,///B/14,///B/47,///B/50"
    },
    {
      "index": 30,
      "num_nts": 4,
      "nts_short": "ACAU",
      "nts_long": "///B/76,///B/75,///B/74,///B/106"
    },
    {
      "index": 31,
      "num_nts": 5,
      "nts_short": "AGGGC",
      "nts_long": "///A/5,///A/6,///A/96,///A/48,///A/49"
    },
    {
      "index": 32,
      "num_nts": 5,
      "nts_short": "GGUGU",
      "nts_long": "///A/16,///A/17,///A/18,///A/37,///A/39"
    },
    {
      "index": 33,
      "num_nts": 5,
      "nts_short": "AGGGC",
      "nts_long": "///B/5,///B/6,///B/96,///B/48,///B/49"
    },
    {
      "index": 34,
      "num_nts": 5,
      "nts_short": "GGUGU",
      "nts_long": "///B/16,///B/17,///B/18,///B/37,///B/39"
    },
    {
      "index": 35,
      "num_nts": 5,
      "nts_short": "GUAUA",
      "nts_long": "///B/57,///B/58,///B/59,///B/60,///B/61"
    },
    {
      "index": 36,
      "num_nts": 7,
      "nts_short": "CUAAAAC",
      "nts_long": "///A/20,///A/19,///A/87,///A/88,///A/89,///A/90,///A/92"
    },
    {
      "index": 37,
      "num_nts": 7,
      "nts_short": "CUAAAAC",
      "nts_long": "///B/20,///B/19,///B/87,///B/88,///B/89,///B/90,///B/92"
    }
  ],
  "nonStack": {
    "num_nts": 10,
    "nts_short": "UCCAGUUCCA",
    "nts_long": "///A/29,///A/40,///A/77,///A/103,///B/31,///B/32,///B/38,///B/40,///B/77,///B/103"
  },
  "num_atom2bases": 7,
  "atom2bases": [
    {
      "index": 1,
      "type": "sugar",
      "atom": "///A/30/O4'",
      "nt": "///A/31",
      "vert_dist": 3.108
    },
    {
      "index": 2,
      "type": "sugar",
      "atom": "///A/96/O4'",
      "nt": "///A/48",
      "vert_dist": 3.098
    },
    {
      "index": 3,
      "type": "sugar",
      "atom": "///A/49/O4'",
      "nt": "///A/76",
      "vert_dist": 3.267
    },
    {
      "index": 4,
      "type": "sugar",
      "atom": "///A/82/O4'",
      "nt": "///A/81",
      "vert_dist": 3.309
    },
    {
      "index": 5,
      "type": "sugar",
      "atom": "///B/96/O4'",
      "nt": "///B/48",
      "vert_dist": 3.098
    },
    {
      "index": 6,
      "type": "sugar",
      "atom": "///B/49/O4'",
      "nt": "///B/76",
      "vert_dist": 3.262
    },
    {
      "index": 7,
      "type": "sugar",
      "atom": "///B/82/O4'",
      "nt": "///B/81",
      "vert_dist": 3.312
    }
  ],
  "num_hairpins": 3,
  "hairpins": [
    {
      "index": 1,
      "type": "hairpin loop",
      "bridging_nts": [
        4
      ],
      "stem_indices": [
        5
      ],
      "summary": "[1] 4 [A.27 A.32] 5",
      "num_nts": 6,
      "nts_short": "AUUUGU",
      "nts_long": "///A/27,///A/28,///A/29,///A/30,///A/31,///A/32",
      "num_stems": 1,
      "bridges": [
        {
          "index": 1,
          "num_nts": 4,
          "nts_short": "UUUG",
          "nts_long": "///A/28,///A/29,///A/30,///A/31"
        }
      ]
    },
    {
      "index": 2,
      "type": "hairpin loop",
      "bridging_nts": [
        7
      ],
      "stem_indices": [
        9
      ],
      "summary": "[1] 7 [A.84 A.92] 3",
      "num_nts": 9,
      "nts_short": "GACAAAAGC",
      "nts_long": "///A/84,///A/85,///A/86,///A/87,///A/88,///A/89,///A/90,///A/91,///A/92",
      "num_stems": 1,
      "bridges": [
        {
          "index": 1,
          "num_nts": 7,
          "nts_short": "ACAAAAG",
          "nts_long": "///A/85,///A/86,///A/87,///A/88,///A/89,///A/90,///A/91"
        }
      ]
    },
    {
      "index": 3,
      "type": "hairpin loop",
      "bridging_nts": [
        7
      ],
      "stem_indices": [
        17
      ],
      "summary": "[1] 7 [B.84 B.92] 3",
      "num_nts": 9,
      "nts_short": "GACAAAAGC",
      "nts_long": "///B/84,///B/85,///B/86,///B/87,///B/88,///B/89,///B/90,///B/91,///B/92",
      "num_stems": 1,
      "bridges": [
        {
          "index": 1,
          "num_nts": 7,
          "nts_short": "ACAAAAG",
          "nts_long": "///B/85,///B/86,///B/87,///B/88,///B/89,///B/90,///B/91"
        }
      ]
    }
  ],
  "num_bulges": 4,
  "bulges": [
    {
      "index": 1,
      "type": "bulge",
      "bridging_nts": [
        0,
        1
      ],
      "stem_indices": [
        4,
        -1
      ],
      "summary": "[2] 0 1 [A.21 A.41 A.22 A.39] 2 1",
      "num_nts": 5,
      "nts_short": "CAUCG",
      "nts_long": "///A/21,///A/22,///A/39,///A/40,///A/41",
      "num_stems": 2,
      "bridges": [
        {
          "index": 1,
          "num_nts": 0,
          "nts_short": "",
          "nts_long": ""
        },
        {
          "index": 2,
          "num_nts": 1,
          "nts_short": "C",
          "nts_long": "///A/40"
        }
      ]
    },
    {
      "index": 2,
      "type": "bulge",
      "bridging_nts": [
        0,
        1
      ],
      "stem_indices": [
        13,
        -3
      ],
      "summary": "[2] 0 1 [B.21 B.41 B.22 B.39] 2 1",
      "num_nts": 5,
      "nts_short": "CAUCG",
      "nts_long": "///B/21,///B/22,///B/39,///B/40,///B/41",
      "num_stems": 2,
      "bridges": [
        {
          "index": 1,
          "num_nts": 0,
          "nts_short": "",
          "nts_long": ""
        },
        {
          "index": 2,
          "num_nts": 1,
          "nts_short": "C",
          "nts_long": "///B/40"
        }
      ]
    },
    {
      "index": 3,
      "type": "bulge",
      "bridging_nts": [
        0,
        2
      ],
      "stem_indices": [
        -1,
        5
      ],
      "summary": "[2] 0 2 [A.22 A.39 A.23 A.36] 1 5",
      "num_nts": 6,
      "nts_short": "AGUGUU",
      "nts_long": "///A/22,///A/23,///A/36,///A/37,///A/38,///A/39",
      "num_stems": 2,
      "bridges": [
        {
          "index": 1,
          "num_nts": 0,
          "nts_short": "",
          "nts_long": ""
        },
        {
          "index": 2,
          "num_nts": 2,
          "nts_short": "GU",
          "nts_long": "///A/37,///A/38"
        }
      ]
    },
    {
      "index": 4,
      "type": "bulge",
      "bridging_nts": [
        0,
        2
      ],
      "stem_indices": [
        -3,
        14
      ],
      "summary": "[2] 0 2 [B.22 B.39 B.23 B.36] 1 5",
      "num_nts": 6,
      "nts_short": "AGUGUU",
      "nts_long": "///B/22,///B/23,///B/36,///B/37,///B/38,///B/39",
      "num_stems": 2,
      "bridges": [
        {
          "index": 1,
          "num_nts": 0,
          "nts_short": "",
          "nts_long": ""
        },
        {
          "index": 2,
          "num_nts": 2,
          "nts_short": "GU",
          "nts_long": "///B/37,///B/38"
        }
      ]
    }
  ],
  "num_iloops": 6,
  "iloops": [
    {
      "index": 1,
      "type": "asymmetric internal loop",
      "bridging_nts": [
        1,
        2
      ],
      "stem_indices": [
        8,
        9
      ],
      "summary": "[2] 1 2 [A.80 A.97 A.82 A.94] 4 3",
      "num_nts": 7,
      "nts_short": "UAGCGGG",
      "nts_long": "///A/80,///A/81,///A/82,///A/94,///A/95,///A/96,///A/97",
      "num_stems": 2,
      "bridges": [
        {
          "index": 1,
          "num_nts": 1,
          "nts_short": "A",
          "nts_long": "///A/81"
        },
        {
          "index": 2,
          "num_nts": 2,
          "nts_short": "GG",
          "nts_long": "///A/95,///A/96"
        }
      ]
    },
    {
      "index": 2,
      "type": "asymmetric internal loop",
      "bridging_nts": [
        1,
        2
      ],
      "stem_indices": [
        16,
        17
      ],
      "summary": "[2] 1 2 [B.80 B.97 B.82 B.94] 4 3",
      "num_nts": 7,
      "nts_short": "UAGCGGG",
      "nts_long": "///B/80,///B/81,///B/82,///B/94,///B/95,///B/96,///B/97",
      "num_stems": 2,
      "bridges": [
        {
          "index": 1,
          "num_nts": 1,
          "nts_short": "A",
          "nts_long": "///B/81"
        },
        {
          "index": 2,
          "num_nts": 2,
          "nts_short": "GG",
          "nts_long": "///B/95,///B/96"
        }
      ]
    },
    {
      "index": 3,
      "type": "asymmetric internal loop",
      "bridging_nts": [
        3,
        1
      ],
      "stem_indices": [
        3,
        4
      ],
      "summary": "[2] 3 1 [A.16 A.44 A.20 A.42] 2 2",
      "num_nts": 8,
      "nts_short": "GGUUCGAC",
      "nts_long": "///A/16,///A/17,///A/18,///A/19,///A/20,///A/42,///A/43,///A/44",
      "num_stems": 2,
      "bridges": [
        {
          "index": 1,
          "num_nts": 3,
          "nts_short": "GUU",
          "nts_long": "///A/17,///A/18,///A/19"
        },
        {
          "index": 2,
          "num_nts": 1,
          "nts_short": "A",
          "nts_long": "///A/43"
        }
      ]
    },
    {
      "index": 4,
      "type": "asymmetric internal loop",
      "bridging_nts": [
        3,
        1
      ],
      "stem_indices": [
        12,
        13
      ],
      "summary": "[2] 3 1 [B.16 B.44 B.20 B.42] 2 2",
      "num_nts": 8,
      "nts_short": "GGUUCGAC",
      "nts_long": "///B/16,///B/17,///B/18,///B/19,///B/20,///B/42,///B/43,///B/44",
      "num_stems": 2,
      "bridges": [
        {
          "index": 1,
          "num_nts": 3,
          "nts_short": "GUU",
          "nts_long": "///B/17,///B/18,///B/19"
        },
        {
          "index": 2,
          "num_nts": 1,
          "nts_short": "A",
          "nts_long": "///B/43"
        }
      ]
    },
    {
      "index": 5,
      "type": "asymmetric internal loop",
      "bridging_nts": [
        2,
        4
      ],
      "stem_indices": [
        2,
        3
      ],
      "summary": "[2] 2 4 [A.12 A.50 A.15 A.45] 6 2",
      "num_nts": 10,
      "nts_short": "CUAGCGAGCG",
      "nts_long": "///A/12,///A/13,///A/14,///A/15,///A/45,///A/46,///A/47,///A/48,///A/49,///A/50",
      "num_stems": 2,
      "bridges": [
        {
          "index": 1,
          "num_nts": 2,
          "nts_short": "UA",
          "nts_long": "///A/13,///A/14"
        },
        {
          "index": 2,
          "num_nts": 4,
          "nts_short": "GAGC",
          "nts_long": "///A/46,///A/47,///A/48,///A/49"
        }
      ]
    },
    {
      "index": 6,
      "type": "asymmetric internal loop",
      "bridging_nts": [
        2,
        4
      ],
      "stem_indices": [
        11,
        12
      ],
      "summary": "[2] 2 4 [B.12 B.50 B.15 B.45] 6 2",
      "num_nts": 10,
      "nts_short": "CUAGCGAGCG",
      "nts_long": "///B/12,///B/13,///B/14,///B/15,///B/45,///B/46,///B/47,///B/48,///B/49,///B/50",
      "num_stems": 2,
      "bridges": [
        {
          "index": 1,
          "num_nts": 2,
          "nts_short": "UA",
          "nts_long": "///B/13,///B/14"
        },
        {
          "index": 2,
          "num_nts": 4,
          "nts_short": "GAGC",
          "nts_long": "///B/46,///B/47,///B/48,///B/49"
        }
      ]
    }
  ],
  "num_ssSegments": 12,
  "ssSegments": [
    {
      "index": 1,
      "num_nts": 1,
      "nts_short": "G",
      "nts_long": "///A/0"
    },
    {
      "index": 2,
      "num_nts": 1,
      "nts_short": "G",
      "nts_long": "///A/6"
    },
    {
      "index": 3,
      "is_broken": true,
      "num_nts": 3,
      "nts_short": "UUA",
      "nts_long": "///A/62,///A/63,///A/67"
    },
    {
      "index": 4,
      "num_nts": 1,
      "nts_short": "A",
      "nts_long": "///A/74"
    },
    {
      "index": 5,
      "num_nts": 1,
      "nts_short": "A",
      "nts_long": "///A/76"
    },
    {
      "index": 6,
      "num_nts": 5,
      "nts_short": "AUAGG",
      "nts_long": "///A/101,///A/102,///A/103,///A/104,///A/105"
    },
    {
      "index": 7,
      "num_nts": 1,
      "nts_short": "G",
      "nts_long": "///B/6"
    },
    {
      "index": 8,
      "is_broken": true,
      "num_nts": 2,
      "nts_short": "UG",
      "nts_long": "///B/28,///B/31"
    },
    {
      "index": 9,
      "num_nts": 4,
      "nts_short": "UAUA",
      "nts_long": "///B/58,///B/59,///B/60,///B/61"
    },
    {
      "index": 10,
      "num_nts": 1,
      "nts_short": "A",
      "nts_long": "///B/74"
    },
    {
      "index": 11,
      "num_nts": 1,
      "nts_short": "A",
      "nts_long": "///B/76"
    },
    {
      "index": 12,
      "num_nts": 5,
      "nts_short": "AUAGG",
      "nts_long": "///B/101,///B/102,///B/103,///B/104,///B/105"
    }
  ],
  "num_Aminors": 4,
  "Aminors": [
    {
      "index": 1,
      "type": "X",
      "desc_short": "A vs G-A (Imino)",
      "desc_long": "///A/87 vs ///A/17,///A/43",
      "A_nt1": {
        "desc": "///A/87 vs ///A/17",
        "face_type": "-",
        "hbonds_num": 1,
        "hbonds_desc": "N1-N2(amino)[3.03]"
      },
      "A_nt2": {
        "desc": "///A/87 vs ///A/43",
        "face_type": "+",
        "hbonds_num": 0,
        "hbonds_desc": ""
      }
    },
    {
      "index": 2,
      "type": "I",
      "desc_short": "A vs G-C (WC)",
      "desc_long": "///A/90 vs ///A/15,///A/45",
      "A_nt1": {
        "desc": "///A/90 vs ///A/15",
        "face_type": "-",
        "hbonds_num": 2,
        "hbonds_desc": "O2'(hydroxyl)-O2'(hydroxyl)[3.55],N3-N2(amino)[2.83]"
      },
      "A_nt2": {
        "desc": "///A/90 vs ///A/45",
        "face_type": "+",
        "hbonds_num": 2,
        "hbonds_desc": "N6(amino)-O2'(hydroxyl)[3.40],N1-O2'(hydroxyl)[2.90]"
      }
    },
    {
      "index": 3,
      "type": "X",
      "desc_short": "A vs G-C (WC)",
      "desc_long": "///B/87 vs ///B/16,///B/44",
      "A_nt1": {
        "desc": "///B/87 vs ///B/16",
        "face_type": "-",
        "hbonds_num": 0,
        "hbonds_desc": ""
      },
      "A_nt2": {
        "desc": "///B/87 vs ///B/44",
        "face_type": "+",
        "hbonds_num": 1,
        "hbonds_desc": "N6(amino)-O2'(hydroxyl)[3.59]"
      }
    },
    {
      "index": 4,
      "type": "I",
      "desc_short": "A vs G-C (WC)",
      "desc_long": "///B/90 vs ///B/15,///B/45",
      "A_nt1": {
        "desc": "///B/90 vs ///B/15",
        "face_type": "-",
        "hbonds_num": 2,
        "hbonds_desc": "O2'(hydroxyl)-O2'(hydroxyl)[3.54],N3-N2(amino)[2.83]"
      },
      "A_nt2": {
        "desc": "///B/90 vs ///B/45",
        "face_type": "+",
        "hbonds_num": 2,
        "hbonds_desc": "N6(amino)-O2'(hydroxyl)[3.33],N1-O2'(hydroxyl)[2.95]"
      }
    }
  ],
  "num_riboseZippers": 4,
  "riboseZippers": [
    {
      "index": 1,
      "num_nts": 6,
      "nts_short": "GGGAAA",
      "nts_long": "///A/15,///A/16,///A/17,///A/88,///A/89,///A/90"
    },
    {
      "index": 2,
      "num_nts": 4,
      "nts_short": "ACGG",
      "nts_long": "///A/74,///A/75,///A/104,///A/105"
    },
    {
      "index": 3,
      "num_nts": 6,
      "nts_short": "GGGAAA",
      "nts_long": "///B/15,///B/16,///B/17,///B/88,///B/89,///B/90"
    },
    {
      "index": 4,
      "num_nts": 4,
      "nts_short": "ACGG",
      "nts_long": "///B/74,///B/75,///B/104,///B/105"
    }
  ],
  "num_splayUnits": 15,
  "splayUnits": [
    {
      "index": 1,
      "num_nts": 2,
      "nts_short": "GU",
      "nts_long": "///A/6,///A/7"
    },
    {
      "index": 2,
      "num_nts": 2,
      "nts_short": "UU",
      "nts_long": "///A/28,///A/29"
    },
    {
      "index": 3,
      "num_nts": 3,
      "nts_short": "UCG",
      "nts_long": "///A/39,///A/40,///A/41"
    },
    {
      "index": 4,
      "num_nts": 2,
      "nts_short": "CG",
      "nts_long": "///A/49,///A/50"
    },
    {
      "index": 5,
      "num_nts": 2,
      "nts_short": "CA",
      "nts_long": "///A/73,///A/74"
    },
    {
      "index": 6,
      "num_nts": 2,
      "nts_short": "AC",
      "nts_long": "///A/76,///A/77"
    },
    {
      "index": 7,
      "num_nts": 3,
      "nts_short": "AGC",
      "nts_long": "///A/90,///A/91,///A/92"
    },
    {
      "index": 8,
      "num_nts": 3,
      "nts_short": "GGG",
      "nts_long": "///A/95,///A/96,///A/97"
    },
    {
      "index": 9,
      "num_nts": 2,
      "nts_short": "GU",
      "nts_long": "///B/6,///B/7"
    },
    {
      "index": 10,
      "num_nts": 5,
      "nts_short": "GUUCG",
      "nts_long": "///B/37,///B/38,///B/39,///B/40,///B/41"
    },
    {
      "index": 11,
      "num_nts": 2,
      "nts_short": "CG",
      "nts_long": "///B/49,///B/50"
    },
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      "distance": 3.132,
      "atom1_id": "///A/217/O2",
      "atom2_id": "///A/217/O3A",
      "atom_pair": "O:O",
      "residue_pair": "ligand:ligand"
    },
    {
      "index": 357,
      "atom1_serNum": 4443,
      "atom2_serNum": 4456,
      "donAcc_type": "acceptable",
      "distance": 2.778,
      "atom1_id": "///A/217/O2",
      "atom2_id": "///A/217/O1B",
      "atom_pair": "O:O",
      "residue_pair": "ligand:ligand"
    },
    {
      "index": 358,
      "atom1_serNum": 4444,
      "atom2_serNum": 4456,
      "donAcc_type": "acceptable",
      "distance": 2.643,
      "atom1_id": "///A/217/O3",
      "atom2_id": "///A/217/O1B",
      "atom_pair": "O:O",
      "residue_pair": "ligand:ligand"
    },
    {
      "index": 359,
      "atom1_serNum": 4452,
      "atom2_serNum": 4458,
      "donAcc_type": "acceptable",
      "distance": 2.500,
      "atom1_id": "///A/217/O1A",
      "atom2_id": "///A/217/O3B",
      "atom_pair": "O:O",
      "residue_pair": "ligand:ligand"
    },
    {
      "index": 360,
      "atom1_serNum": 4481,
      "atom2_serNum": 4495,
      "donAcc_type": "acceptable",
      "distance": 2.946,
      "atom1_id": "///B/216/O3",
      "atom2_id": "///B/216/O3B",
      "atom_pair": "O:O",
      "residue_pair": "ligand:ligand"
    }
  ],
  "refCoords": {
    "purine": [
      "   12 ATOMS,    12 BONDS",
      "    1 N      -2.2500   5.0000   0.4000",
      "    2 N      -2.2500  -0.5000   0.4000",
      "    3 N      -2.2500  -0.5000  -0.4000",
      "    4 N      -2.2500   5.0000  -0.4000",
      "    5 C       1.2500   5.0000   0.4000",
      "    6 C       1.2500  -0.5000   0.4000",
      "    7 C       1.2500  -0.5000  -0.4000",
      "    8 C       1.2500   5.0000  -0.4000",
      "    9 C      -2.2500   5.0000   0.4000",
      "   10 C      -2.2500  -0.5000   0.4000",
      "   11 C      -2.2500  -0.5000  -0.4000",
      "   12 C      -2.2500   5.0000  -0.4000",
      "    1     1     2",
      "    2     2     3",
      "    3     3     4",
      "    4     4     1",
      "    5     5     6",
      "    6     6     7",
      "    7     7     8",
      "    8     5     8",
      "    9     9     5",
      "   10    10     6",
      "   11    11     7",
      "   12    12     8"
    ],
    "pyrimidine": [
      "   12 ATOMS,    12 BONDS",
      "    1 N      -2.2500   5.0000   0.4000",
      "    2 N      -2.2500   1.0000   0.4000",
      "    3 N      -2.2500   1.0000  -0.4000",
      "    4 N      -2.2500   5.0000  -0.4000",
      "    5 C       1.2500   5.0000   0.4000",
      "    6 C       1.2500   1.0000   0.4000",
      "    7 C       1.2500   1.0000  -0.4000",
      "    8 C       1.2500   5.0000  -0.4000",
      "    9 C      -2.2500   5.0000   0.4000",
      "   10 C      -2.2500   1.0000   0.4000",
      "   11 C      -2.2500   1.0000  -0.4000",
      "   12 C      -2.2500   5.0000  -0.4000",
      "    1     1     2",
      "    2     2     3",
      "    3     3     4",
      "    4     4     1",
      "    5     5     6",
      "    6     6     7",
      "    7     7     8",
      "    8     5     8",
      "    9     9     5",
      "   10    10     6",
      "   11    11     7",
      "   12    12     8"
    ],
    "wc_pair": [
      "   12 ATOMS,    12 BONDS",
      "    1 N      -2.2500   5.0000   0.4000",
      "    2 N      -2.2500  -5.0000   0.4000",
      "    3 N      -2.2500  -5.0000  -0.4000",
      "    4 N      -2.2500   5.0000  -0.4000",
      "    5 C       2.2500   5.0000   0.4000",
      "    6 C       2.2500  -5.0000   0.4000",
      "    7 C       2.2500  -5.0000  -0.4000",
      "    8 C       2.2500   5.0000  -0.4000",
      "    9 C      -2.2500   5.0000   0.4000",
      "   10 C      -2.2500  -5.0000   0.4000",
      "   11 C      -2.2500  -5.0000  -0.4000",
      "   12 C      -2.2500   5.0000  -0.4000",
      "    1     1     2",
      "    2     2     3",
      "    3     3     4",
      "    4     4     1",
      "    5     5     6",
      "    6     6     7",
      "    7     7     8",
      "    8     5     8",
      "    9     9     5",
      "   10    10     6",
      "   11    11     7",
      "   12    12     8"
    ]
  },
  "metadata": {
    "license": "http://innovation.columbia.edu/technologies/CU20391",
    "url": "http://x3dna.org/",
    "url_alt": "http://home.x3dna.org/",
    "forum": "http://forum.x3dna.org/",
    "citation": "Lu et al. (2015). 'DSSR: an integrated software tool for dissecting the spatial structure of RNA.' Nucleic Acids Res., 43(21):e142 [doi:10.1093/nar/gkv716].",
    "str_id": "6ck5",
    "num_naChains": 2,
    "naChains": "A=108,B=100",
    "num_atoms": 4545,
    "num_waters": 52,
    "num_metals": 31,
    "metals_desc": "Mg=8,K=3,Ba=20",
    "num_notes": 52,
    "notes": [
      {
        "Aminors": "A-minor interactions (including types I and II)"
      },
      {
        "Cstem_index": "stem index of the 'Canonical' helix in k-turn"
      },
      {
        "Cstem_pair": "Cstem bp delineating the k-turn internal loop"
      },
      {
        "Dp": "perpendicular distance of the 3' P atom to the glycosidic bond"
      },
      {
        "GA_pair": "sheared G-A pair in k-turn"
      },
      {
        "HtypePknot": "H-type pseudoknot"
      },
      {
        "Kturn": "kink-turn (k-turn)"
      },
      {
        "LW": "Leontis-Westhof"
      },
      {
        "NCstem_index": "stem index of the 'Non-Canonical' helix in k-turn"
      },
      {
        "NCstem_pair": "NCstem bp delineating the k-turn internal loop"
      },
      {
        "Uturn": "U-turn of the UNR- or GNRA-type"
      },
      {
        "aa": "amino acid"
      },
      {
        "atom_pair": "symbols of the two atoms involved in an H-bond"
      },
      {
        "auxfiles": "auxiliary files"
      },
      {
        "glyco_bond": "conformation of base related to sugar (syn or anti)"
      },
      {
        "bb_type": "backbone conformation, BI or BII"
      },
      {
        "bending_angle": "angle between two helical axes"
      },
      {
        "bp": "base pair"
      },
      {
        "bseq": "base sequence in one-letter code"
      },
      {
        "bulge": "bulge loop"
      },
      {
        "coaxStacks": "coaxial stacking of stems within a helix"
      },
      {
        "dbn": "dot bracket notation"
      },
      {
        "desc": "description"
      },
      {
        "donAcc_type": "donor/acceptor type of the atom pair in an H-bond"
      },
      {
        "epsilon_zeta": "difference between epsilon and zeta torsion angles"
      },
      {
        "hairpin": "hairpin loop"
      },
      {
        "hbond": "hydrogen bond (H-bond)"
      },
      {
        "helix": "defined by base-stacking interactions, regardless of bp type and backbone connectivity"
      },
      {
        "id": "identifier"
      },
      {
        "iloop": "internal loop"
      },
      {
        "index": "serial number"
      },
      {
        "isoCanonPairs": "isolated canonical pairs"
      },
      {
        "junction": "(multi-branched) junction loop"
      },
      {
        "kissingLoop": "kissing loop"
      },
      {
        "multiplet": "3+ bases in a coplanar geometry"
      },
      {
        "na": "nucleic acid"
      },
      {
        "nonPair": "two nts not forming a pair, but with H-bonding/stacking interactions"
      },
      {
        "nonStack": "nucleotide not involved in stacking interactions"
      },
      {
        "nt": "nucleotide"
      },
      {
        "num": "number"
      },
      {
        "oArea": "overlap areas between two bases, including exocyclic atoms"
      },
      {
        "oArea_ring": "overlap areas between two bases, including only ring atoms"
      },
      {
        "phosContacts": "H-bonding and atom-capping interactions involving a phosphate"
      },
      {
        "residue_pair": "types of the two residues involved in an H-bond"
      },
      {
        "rmsd": "root-mean-squares deviation"
      },
      {
        "serNum": "serial number"
      },
      {
        "ssSegments": "single-stranded segments not involved in loops"
      },
      {
        "ssZp": "Z-coordinate of the 3' phosphorus atom with reference to the 5' base plane"
      },
      {
        "sstr": "secondary structure in dbn"
      },
      {
        "stem": "helix consisting of only canonical pairs, with a continuous backbone"
      },
      {
        "str_id": "structure identifier, derived from inpfile with extension removed"
      },
      {
        "vert_dist": "vertical distance from an atom to a base plane"
      }
    ],
    "num_auxfiles": 19,
    "auxfiles": [
      {
        "index": 1,
        "name": "dssr-pairs.pdb",
        "desc": "an ensemble of base pairs"
      },
      {
        "index": 2,
        "name": "dssr-multiplets.pdb",
        "desc": "an ensemble of multiplets"
      },
      {
        "index": 3,
        "name": "dssr-stems.pdb",
        "desc": "an ensemble of stems"
      },
      {
        "index": 4,
        "name": "dssr-helices.pdb",
        "desc": "an ensemble of helices (coaxial stacking)"
      },
      {
        "index": 5,
        "name": "dssr-hairpins.pdb",
        "desc": "an ensemble of hairpin loops"
      },
      {
        "index": 6,
        "name": "dssr-bulges.pdb",
        "desc": "an ensemble of bulges"
      },
      {
        "index": 7,
        "name": "dssr-iloops.pdb",
        "desc": "an ensemble of internal loops"
      },
      {
        "index": 8,
        "name": "dssr-2ndstrs.bpseq",
        "desc": "secondary structure in bpseq format"
      },
      {
        "index": 9,
        "name": "dssr-2ndstrs.ct",
        "desc": "secondary structure in connectivity table format"
      },
      {
        "index": 10,
        "name": "dssr-2ndstrs.dbn",
        "desc": "secondary structure in dot-bracket notation"
      },
      {
        "index": 11,
        "name": "dssr-torsions.txt",
        "desc": "backbone torsion angles and suite names"
      },
      {
        "index": 12,
        "name": "dssr-splays.pdb",
        "desc": "an ensemble of splayed-apart units"
      },
      {
        "index": 13,
        "name": "dssr-Aminors.pdb",
        "desc": "an ensemble of A minor motifs (types I and II)"
      },
      {
        "index": 14,
        "name": "dssr-stacks.pdb",
        "desc": "an ensemble of base stacks"
      },
      {
        "index": 15,
        "name": "dssr-atom2bases.pdb",
        "desc": "an ensemble of atom-base stacking interactions"
      },
      {
        "index": 16,
        "name": "dssr-rotmat.txt",
        "desc": "position vector and rotation matrix"
      },
      {
        "index": 17,
        "name": "dssr-viewV.pdb",
        "desc": "vertical view of the principal moment of inertia"
      },
      {
        "index": 18,
        "name": "dssr-viewH.pdb",
        "desc": "horizontal view of the principal moment of inertia"
      },
      {
        "index": 19,
        "name": "dssr-viewT.pdb",
        "desc": "top view of the principal moment of inertia"
      }
    ],
    "time_used": "999"
  }
}